My impression so far.
The layout itself is quite OK apart from the last hairpin which seems to have larger radius than in reality.
Elevation changes are the main part to work on currently. The biggest parts are turns 5-6-7 where we have a noticeable slope downwards and the last S-bend after the hairpin where you are literally climbing upstairs (if not climbing a mountain). When in the car the climb looks almost vertical. Also the descent downwards on the last "straight" (turn 11) starts earlier. You start feeling in at the exit of turn 10, then T11 is a blind corner, you can see the exit just before the apex.
There is also a small banking at the apex of T1. At the exit of turn 2 the surface is banked a bit towards the corner until the middle of the road, and then it flattens out or even gets a bit of negative banking.
Regarding cosmetics like kerbs and jumps in the tarmac (especially T3 and the back straight) you surely know yourself.
If you need any photos or onboards don't hesitate to ask. Although there are plenty of onboards on youtube.
Here is an example:
https://www.youtube.com/watch?v=F2Uqrj8pq5k
Once I have completed this layout, I will move onto the new F1 layout. As I would like to have the rest of the track completed to the current standard, and then move onto that layout. It should not be much longer after release.